Filter.



H. B. PABER.

FILTER.

APPLICATION FILED OUT. 28, 1914.

Patented Mar. 30, 1915.

UNITED STATES PATENT OFFICE.

HENRY B. FABER, OF NEW YORK, N. Y."

FILTER.

exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same.

This invention relates to improvements in metallurgical filters and more particularly to such as are designed for de-watering operations, that is, for separating the solids and liquid of ore pulp or other like substances.

The primary object in view is the rapid removal of solutions from solids while avoiding creation of paths of substantially non-resistance to the flow of solutions incident to the formation of-cracks or channels in the body or cake of solids.

With this and further objects in view as will in part hereinafter become apparent and in part be specifically stated, the invention comprises certain novel constructions, combinations and arrangements of parts as subsequently set forth and claimed.

In the accompanying drawing: Figure l is a view in side elevation of an apparatus embodying the features of the present invention, parts being broken away and showing other parts in vertical, transverse axial section. Fig. 2 is a sectional elevation thereof certain of the communicating pipes and their controlling valves being omitted for the sake of clearness. Fig. 3 is an enlarged fragmentary plan indicating the action of the controlling valves. Fig. 4 is a detail diagrammatic showing of a slight modification.

Referring to the drawing by numerals, 1, 1, indicate appropriate supports in which is journaled a tubular axle orshaft 2, carrying gear 3 meshing with worm 4 carried by stubshaft 5 and driven from any appropriate source of power not illustrated.

Fixed to the axle 2 are-hub spiders 6, 6 spaced apart axially and each provided with an axial flange 6 and a radial flange 6". A series of radially extending rods 7 project outward from each spider 6 being passed through the axial flange thereof and connected. against outward radial movement Specification of Letters Patent. 7 Patented B1 30, 1915.

Application filed October as, 1914.

Serial No. 869,080.

by a nut 7, engaging the inner end of the respective rod, the outer end portion of each rod being'bent to extend laterally, that is, axially through an annulus 8, the extended terminal portion of each rod being engaged outside of the respective annulus by a nut 7". Spacing rods 9 connect the annuli 8 and retain the same spaced so as to produce a skeleton wheel structure in which are mounted filtering pockets 10. Each pocket 10 is preferably formed of sheet metal and tapers inward, since its sides are parallel to the radii of the circle described by the wheel, and the bottom of each of the pockets rests on an annulus 11 at each end, there being an annulus 11 surrounding the axial flange 6 of each hub member 6. As a matter of facility of construction, the side walls 10' and bottom 10 of the several pockets 10 may be formed of a single strip of sheet metal bent or shaped successively into pockets with the outer portion of the strip bent over the respective rods 9, or the pockets may be separately formed as distinct units and in either event the end wall 10 of each pocket tapers inward and is fixed along its edges to the side edges of the side walls and at its inner end to the ends of the bottom 10', each pocket being disposed between a rod 7 and the next adjacent rod 7 at each side of the wheel structure and engaging said rods so that the pockets are strengthened and retained in their respective positions by said rods.

It is to be noted that each pocket 10 is of greater depth than width, that is, extends farther in a radial direction than it does in the direction of the circumference of the wheel structure. The length of the pocket, that is, its dimension in an axial direction, is not so material, since it is the depth relative to the width and the taper of the pocket which enables drawing off moisture from a cake of solids without cracking or seaming the body of the cake. A crack or seam would be fatal since it would admit air and allow the suction pump to draw air through the seam or crack. instead of drawing moisture from the solids as will become more fixed to the walls of the respective pockets. A sheet of canvas or other filter fabrlc or I filter material 13 engages the outer face of each plate 12 andis fixed thereto so as'to prevent passage of solids from the main part of the pocket into the inner end portion or area spaced off by the partition 12. Entering the said area of each of said pockets is a suction pipe 14, there being one pipe 14 for eachpocket 10 and all of the pipes 14 communicating with the interior of the tubular shaft 2. A partition plate 14' is preferably provided in shaft 2 both to limit the area of suction and to prevent fluid from having access to the driving gear. The end of shaft nearer partition 14 is engaged by a cap 16 supplied with a suction tube 17, which ex tends to a hydraulic pump or other aspirator not illustrated. In the length of each pipe 14 .is arranged a valve 15 which is maintained normally closed by spring 16. Each valve 15 is provided with an operating arm 17. y A cam plate 18, of arcuate form is arranged in the path of movement of the free end portions of the several arms 17 so as to engage each arm as the valve passesthe end of cam plate 18 and causes swinging of the arm during further movement of the valve as clearly indicated in Fig. 3, and until the valve is open, in which position the valve is retained as long as the respective arm 17 I engages plate 18. The plate 18 is of a length for retaining the valve open during about ninetydegrees of angular advance of the respective parts of the wheel, the plate 18 being carried by arms 19, 19 and fixed at their inner ends to the cap of one of-thebearing o sleeves sustained by one of the supports 1.

"5O I hopper 20, whereupon, the arm 7 of the valve A hopper 20 is arranged to deliver ma terial to the pockets 10 successively as the wheel revolves and a chute 21 is disposed to receive solids discharged from the pockets. The location of the chute 21 will, of course, vary with the nature and condition :of the solids and the resulting point or points of v discharge. p

In operation the wheel is revolved slowly, say at a rate equal approximately to one revolution in five minutes. 'Each pocket is filled and is then advanced from beneath the 15 of the particular pipe 14 communicating with the given pocket strikes plate 18 and the valve 15 is caused to open thereby, whereupon the area .beneath the partition 12 is I subjected to suction which, of course, affects the entire contained mass, permitting atmospheric pressure to act to drive the solutions from the solids inward through the filter material 13, the openings of plate 12 and into the area at the hub engaging portion of the respective pocket and thence out through the given pipe'14 to the shaft 20 and away from the machine. It will be noticed that the convergence of the side walls of each stantial uniformity of the taper of the two side walls thereof is manifested in the ease and freedom with which the compact body of solids in a given pocket is discharged. As a particular pocket advances with the arm 17 of the controlling valve for the particular pocket traveling along plate 18, the

discharge of liquid or solutions is continued, but as soon as the particular arm '17 arrives at the end of the plate 18 the spring 16 closes the valve and the valve remains closed until the wheel has sufiiciently nearly completed a revolution to bring the arm 17 backagain into contact with plate 18 incident to repetition of the operation above set forth. As

, the suction is shut oil from a particular pocket the pocket moves on until the action of gravity becomes sufiicient to cause the body of solids within the pocket to fall or slide from the pocket out into the discharge chute or hopper 21.

The hopper or receiving element for dewatered solids may vary in form and location as indicated from the modified arrangements seen in Fig. 4, wherein the dewatering wheel 8 is the same in construction and operation as above described, but is appropriately mounted for being arranged above a chute or hopper 21' con structed to receive discharging solids delivered from-the .wheel, at a point either directly beneath the wheel or at a lower point iiha'n the 1 point of discharge indicated in It is to be noted that each of the pockets 10 and the manner of application of suction thereto are such that moisture will be sucked uniformly from all portions of a body of solids within the pocket. The term sucked is employed merely for facility of expression, it being, of course, understood that the suction pump when acting on the moisture carried bythe solids in the pocket 10 is merely enabling the atmospheric pressure to act plus the gravity action by relieving the atmospheric pressure at the inner point or bottom of the pocket so that the moisture is really removed by a difference in pressure within the solids-containing portion of the pocket from that at the extreme inner portion of the pocket.

What I claim is:

1. In a device of the class described, the combination, with a rotary support, of. a pocket carried thereby having an open outer end and being of greater depth radially than Width circumferentially, means for discharge of liquid from the inner end of the pocket, and means for preventing discharge of solids from the inner end of the pocket, the pocket being connected with the support in position for being inverted during movement of the support for discharging solids from the outer end of the pocket.

2. In an apparatus of the class described, the combination with a rotary support, of a radially extending pocket carried by the support and having an open outer end, said pocket being of greater depth radially than width circumferentially, means for draining liquid from the pocket inwardly, and means for preventing inward discharge of solids from the pocket.

3. In an apparatus of the class described, the combinationwith a rotary support, of a radially extending inwardly tapering pocket carried by the support and having an open outer end, said pocket being of greater depth radially than width circumferentially, means for draining liquid inwardly from the pocket, and means for preventing discharge of. solids inward from the pocket.

4. In an apparatus of the class described,

the combination with a rotary support, of I a radially extending inwardly tapering pocket carried by the support and having an outer open end, and means for sucking moisture inwardly from solids in the pocket, the taper of the pocket being such as to substantially uniformly distribute the action of the suction in the various parts of the contained solids.

5. In an apparatus of the class described, the combination with a rotary wheel, of a series of radially disposed, inwardly converging pockets extending from the eriphery'of the wheel substantially to its hub portion and open at the wheel, means for supplying pulp from above into the pockets, suction means connected with the inner end of each pocket for effecting discharge of liquid from the pockets, and means for preventing the discharge of solids inward from the pockets.

6. In an apparatus of the class described, the combination with rotary hub members, of annuli concentric therewith and surrounding the same, radial rods connecting the hub members with the annuli, rods oonnecting the annuli, radial pockets disposed between the first mentioned rods and engaging the second mentioned rods, each pocket having discharge means for liquid at its inner portion, and means for preventing discharge of solids at the inner portion of each pocket, the outer end portion of each pocket being open, and each pocket extending inward substantially to the hub members. In testimon whereof I aflix my signature in presence 0 two witnesses.

HENRY B. FABER Witnesses:

J OHN R. F oxn, CLAUDE Rosso.

periphery of the 

